Still for treating recovered grease.



No. 896,093. PATENTED AUG. 18, 1908. 0. ELLIS. STILL FOR TREATINGRECOVERED GREASE.

APPLICATION FILED MAR.10,- 1905.

" I Suva/Mo:

UNITED STATES PATENT OFFICE.

CARLETON ELLIS, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO ELLIS-FOSTERCOMPANY, A

CORPORATION OF NEW JERSEY.

Specification pf Letters Patent.

Patented Aug; 18, 1908.

Application filed March 10, 1905. SerialNo. 249,435.

liquid is obtained which up to the present has been but little utilizedand therefore constitutes a waste product which has to be dischargedinto running water. As a consequence the stream is polluted and becomesa source of annoyance and. danger to the dwellers alon its course;

It is the ob ect of this invention to provide an apparatus to convertthese soapy liquors into valuable commercial productsby recovering andpurifying the contained grease and oils. The apparatus by which Iaccomplish this is a still, to be hereinafter described, provided withmeans for supplying superheated steam.

The grease is first separated by the addition to the solution of lime,or an acid, or in any other suitable manner. The mass is filtered andthe filtrate, which carries no harmful ingredients may be dischargedinto the stream. The fatty matter is pressed to remove as much water,mechanically, as possible, and is then ready for introduction into thedistilling apparatus. At this stage it contains about 20 70 of water andto introduce the mass directly into the still would involve heating forseveral hours or even a day to drive off the moisture before thedistillation proper with superheated steam could be conducted. Itherefore make use of the heat of condensation of a preceding distillatefor drying the mass previous to introduction into the still.

The accompanying drawing shows a 'ver-' tical cross-section of thestill. .As shown in the drawing a cylindrical vessel A, with goose neckB rests upon a fireplace C. In the fireplace is located a superheater Ddischarging steamthrou h aperforated pipe E into A. Above t e vessel Aand connected thereto by the valved conduit e is placed a second vesselF of somewhat less capacity than A! The vessel F is provided with anopening f for introducing the grease and permitting the escape ofvapors.The goose neck B passes through F and at about the middle of its lengthis fitted with the trap G containing bafiie plate a. The vessel issupplied with a thermometer d and the float c for determining' the levelof the liquid. A distributing ipe E in the lower part of the vesselAsuppies the steam required in the process of. distillation. This pipe isperforated throughout its length as s own at f f.v

The operation is as folloWs:'-A charge of the dry grease is placed in A,and one of the wet grease is placed in "F. A is then heated and the oildistilled by blowin contained water, t ereby effectua ly andeconomically drying the oil and preparing it The heat given out by theconden for distillation. By the utilization of the heat of condensationin this manner a great saving intime, fuel and cost of operation iseffected. J

What I claim as'my invention and desire to secure by Letters Patent is z1 In an apparatus for distilling recovered grease, the combination of anelongated dis-' tilling receptacle, superimposed upon a heating chamber,a steam superheater within said heating chamber, a longitudinalperforated pipe Within the distilling receptacle having connection withthe su erheater, a goose neck located at one end of t e distillingreceptacle, a trap in said oose neck provided with a vertical baffle pate, upper and lower drawoffs attached to said trap, and a preliminarydrying chamber for the wet grease surrounding the said trap and restingupon the top of the other end of the distillingreceptacle, a verticalvalved conduit being provided for connecting the drying chamber with thedistilling receptacle. q

In testimony whereof I have affixed my signature, in presence of twowitnesses.

'CARLETON ELLIS. Witnesses:

' HENRY C. SAWYER, SOPHIA WILSON.

